公开(公告)号：AU702154B2

公开(公告)日：1999-02-18

申请号：AU5130896

申请日：1996-03-20

Applicant: ERICSSON TELEFON AB L M

Inventor： WALLSTEDT KENNETH ,  ALMGREN MAGNUS ,  FRODIGH MAGNUS ,  ANDERSSON HAKAN

IPC: H04B7/005 ,  H04W16/10 ,  H04W52/34 ,  H04Q7/36

Abstract: In a cellular communication system, a method and apparatus are provided for allocating a channel for use on a connection between a base station and a mobile station in a cell, without making measurements of downlink interference. Throughout the system, uplink and downlink power levels are regulated so that, within each cell, their sum changes by an amount whose magnitude is substantially equal to the magnitude of change in path gain between the mobile station and the base station in that cell, and which sum is opposite in sign to the amount of change in path gain. This power regulation scheme assures that there will be a strong correlation between system-wide measurements of uplink and downlink interference. Therefore, with the power regulation scheme in place, each cell determines uplink carrier to interference (C/I) ratios for the free channels available for use in the cell and selects an acceptable free channel having a C/I value that is within a predetermined acceptable range. If uplink C/I on the acceptable free channel is greater than the uplink C/I value of a channel currently assigned to a connection, then an intra-cell handover is performed so that the connection will be reassigned to the acceptable free channel. This technique is useful for providing an adaptive channel allocation scheme to systems, such as analog cellular communications systems, in which downlink interference measurements cannot be made.

公开(公告)号：DE69932171D1

公开(公告)日：2006-08-10

申请号：DE69932171

申请日：1999-10-01

Applicant: ERICSSON TELEFON AB L M

Inventor： JOHANSSON CHRISTER ,  FRODIGH MAGNUS

IPC: H04B7/005 ,  H04W36/06 ,  H04W36/08 ,  H04W36/22 ,  H04W52/04

Abstract: The present invention provides a method by which users may be moved between time slots or between base stations in order to better utilize the MCPA output power resources. According to an exemplary embodiment of the present invention, the power of all transceivers served by a certain MCPA is compared to a threshold value X. The value X is at least related to the capability of the MCPA in terms of output power. If at no times (i.e., at all time slots), the sum of the output power exceeds the threshold value X, it is assumed that the MCPA can handle all simultaneous transmissions. If, during at least one time slot it is found that the required output power exceeds the capability of the serving MCPA, then a reallocation or load sharing algorithm is invoked. The reallocation algorithm searches for time slots to which a reallocation could be performed within the same base station or number of transceivers served by the MCPA. If no time slots can handle users from the time slot in which the MCPA limit is exceeded, then a load sharing algorithm is activated and one starts to look for transmission resources in transceivers served by other MCPAs, e.g., other cells. A number of alternative embodiments of the invention is described, which relates to the way in which the reallocation or load sharing is performed. By reallocating or moving users of a particular kind, e.g., single slot users, and avoiding reallocation of users of other particular kinds, the load sharing and reallocation are further improved.

公开(公告)号：DE69734870T2

公开(公告)日：2006-08-10

申请号：DE69734870

申请日：1997-01-28

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  BEMING JOHAN ,  FRODIGH MAGNUS

IPC: H04W16/02 ,  H04W16/12 ,  H04W48/06

Abstract: Circuitry, and an associated method for a multi-user communication system, such as a cellular communication system. Additional communication is selectively permitted in the communication system through operation of the circuitry. Levels of communication quality of ongoing communication in the communication system are determined. When a request is made to admit additional communication, the additional communication is admitted only when the level of communication quality is better than a selected threshold.

公开(公告)号：DE69831343D1

公开(公告)日：2005-09-29

申请号：DE69831343

申请日：1998-06-26

Applicant: ERICSSON TELEFON AB L M

Inventor： FRODIGH MAGNUS ,  ALMGREN MAGNUS ,  OLOFSSON H KAN

IPC: H04B7/26 ,  H04W36/30 ,  H04Q7/38

Abstract: The invention relates to a method of performing handover in a mobile radio system. The mobile radio system performs quality measurements on signals transmitted (300) between a mobile terminal and predetermined radio base stations. Handover is performed (301, 302, 303) when some of the measured signal strengths exceeds the signal strength for the radio base station to which the mobile terminal for the moment is set up, added to a handover value. The handover value is dependent on measured signal strengths and neighboring cell relation values. The neighboring cell relation values depend on a probability for handover to be performed from one radio base station to another radio base station in the mobile radio system.

公开(公告)号：DE60022017D1

公开(公告)日：2005-09-22

申请号：DE60022017

申请日：2000-03-10

Applicant: ERICSSON TELEFON AB L M

Inventor： FRODIGH MAGNUS ,  RIMHAGEN THOMAS

IPC: H04L5/02 ,  H04L5/22 ,  H04L12/28 ,  H04L12/56 ,  H04W28/08 ,  H04W36/18 ,  H04W72/04 ,  H04Q7/38

Abstract: A method and system enables high data-rate users to be serviced even from within congested cells. If a user that is associated with an MS is located within a first cell that is too congested to provide the bandwidth requested by the user, all or a part of the information flow to/from the MS may be transceived from/to other nearby cells. For example, in a TDMA system, a user requiring three time slots per frame in order to aggregate sufficient bandwidth may be in communication with three different cells during each frame. The present invention may additionally be applied in the context of handoffs when, for example, an MS continues to be partially served by the previous cell before the new cell is able to service the high data-rate information flow. In another embodiment, the present invention may be implemented in a local wireless network environment in which multiple radio heads are controlled by a HUB.

公开(公告)号：AU3991000A

公开(公告)日：2000-10-16

申请号：AU3991000

申请日：2000-03-10

Applicant: ERICSSON TELEFON AB L M

Inventor： FRODIGH MAGNUS ,  RIMHAGEN THOMAS

IPC: H04L5/02 ,  H04L5/22 ,  H04L12/28 ,  H04L12/56 ,  H04W28/08 ,  H04W36/18 ,  H04W72/04 ,  H04Q7/38

Abstract: A method and system enables high data-rate users to be serviced even from within congested cells. If a user that is associated with an MS is located within a first cell that is too congested to provide the bandwidth requested by the user, all or a part of the information flow to/from the MS may be transceived from/to other nearby cells. For example, in a TDMA system, a user requiring three time slots per frame in order to aggregate sufficient bandwidth may be in communication with three different cells during each frame. The present invention may additionally be applied in the context of handoffs when, for example, an MS continues to be partially served by the previous cell before the new cell is able to service the high data-rate information flow. In another embodiment, the present invention may be implemented in a local wireless network environment in which multiple radio heads are controlled by a HUB.

公开(公告)号：BR9811386A

公开(公告)日：2000-08-29

申请号：BR9811386

申请日：1998-08-25

Applicant: ERICSSON TELEFON AB L M

Inventor： SCHRAMM PETER ,  SKOLD JOHAN ,  HOOK MIKAEL ,  FRODIGH MAGNUS ,  MULLER FANK

IPC: H04Q7/38 ,  H04B7/26

Abstract: A method of communicating control information in systems that support multiple modulation schemes for communicating voice or data and control information. To provide backward compatibility dedicated control channels use the modulation scheme used in current systems, for example GMSK modulation scheme. Traffic channels and associated control channels use linear modulation schemes that have the same symbol rate. The modulation scheme of the associated control channel uses a reduced signal set of the modulation scheme used for traffic channels. Also, an in-band signalling procedure is used to indicate to a receiving station the modulation type, channel coding and speech coding used for a transmitted burst.

公开(公告)号：CA2331999A1

公开(公告)日：1999-11-25

申请号：CA2331999

申请日：1999-05-07

Applicant: ERICSSON TELEFON AB L M

Inventor： KHAN FAROOQ ,  DALIBOR TURINA ,  FRODIGH MAGNUS

IPC: H04W28/02 ,  H04W28/10 ,  H04W28/12 ,  H04W92/12 ,  H04Q7/38

Abstract: A radiocommunication system supports high throughput rates over an air interface. An access network interface, e.g., between a base station and base station controller, conveys information between the base station and the rest of the terrestrial system. Techniques are provided to adjust transmission rates over the air interface based on loading of the access network. Techniques are also provided to control bandwidth allocation over the access network interface and distribute call blocking/delay percentages when there is an imbalance between the capacity of the air interface and the access network interface.

公开(公告)号：AU9595898A

公开(公告)日：1999-04-23

申请号：AU9595898

申请日：1998-09-29

Applicant: ERICSSON TELEFON AB L M ,  ERICSSON GE MOBILE INC

Inventor： ALMGREN K MAGNUS ,  FRODIGH MAGNUS ,  MAGNUSSON SVERKER ,  VERDIER LISA DE ,  WALLSTEDT KENNETH

IPC: H04W16/18 ,  H04Q7/34

公开(公告)号：AU9012298A

公开(公告)日：1999-03-22

申请号：AU9012298

申请日：1998-08-25

Applicant: ERICSSON TELEFON AB L M

Inventor： SCHRAMM PETER ,  SKOLD JOHAN ,  HOOK MIKAEL ,  FRODIGH MAGNUS ,  MULLER FRANK

IPC: H04Q7/38 ,  H04B7/26

Abstract: A method of communicating control information in systems that support multiple modulation schemes for communicating voice or data and control information. To provide backward compatibility dedicated control channels use the modulation scheme used in current systems, for example GMSK modulation scheme. Traffic channels and associated control channels use linear modulation schemes that have the same symbol rate. The modulation scheme of the associated control channel uses a reduced signal set of the modulation scheme used for traffic channels. Also, an in-band signalling procedure is used to indicate to a receiving station the modulation type, channel coding and speech coding used for a transmitted burst.